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[ARM] S3C: PM save UART UDIVSLOT if doing PM

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Add the facility to save the UART UDIVSLOT register if the UART
state is being saved over suspend.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-12-12 00:24:24 +00:00
parent 57699e9adf
commit 4b637dc231
2 changed files with 11 additions and 0 deletions
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3
arch/arm/plat-s3c/include/plat/pm.h
View file

@ -44,6 +44,8 @@ extern void (*pm_cpu_sleep)(void);
extern unsigned long s3c_pm_flags; extern unsigned long s3c_pm_flags;
extern unsigned char pm_uart_udivslot; /* true to save UART UDIVSLOT */
/* from sleep.S */ /* from sleep.S */
extern int s3c_cpu_save(unsigned long *saveblk); extern int s3c_cpu_save(unsigned long *saveblk);
@ -88,6 +90,7 @@ struct pm_uart_save {
u32 ufcon; u32 ufcon;
u32 umcon; u32 umcon;
u32 ubrdiv; u32 ubrdiv;
u32 udivslot;
}; };
/* helper functions to save/restore lists of registers. */ /* helper functions to save/restore lists of registers. */

8
arch/arm/plat-s3c/pm.c
View file

@ -70,6 +70,8 @@ static inline void s3c_pm_debug_init(void)
/* Save the UART configurations if we are configured for debug. */ /* Save the UART configurations if we are configured for debug. */
unsigned char pm_uart_udivslot;
#ifdef CONFIG_S3C2410_PM_DEBUG #ifdef CONFIG_S3C2410_PM_DEBUG
struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS]; struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
@ -84,6 +86,9 @@ static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
save->umcon = __raw_readl(regs + S3C2410_UMCON); save->umcon = __raw_readl(regs + S3C2410_UMCON);
save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV); save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
if (pm_uart_udivslot)
save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);
S3C_PMDBG("UART[%d]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n", S3C_PMDBG("UART[%d]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",
uart, save->ulcon, save->ucon, save->ufcon, save->ubrdiv); uart, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);
} }
@ -108,6 +113,9 @@ static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
__raw_writel(save->ufcon, regs + S3C2410_UFCON); __raw_writel(save->ufcon, regs + S3C2410_UFCON);
__raw_writel(save->umcon, regs + S3C2410_UMCON); __raw_writel(save->umcon, regs + S3C2410_UMCON);
__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV); __raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);
if (pm_uart_udivslot)
__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);
} }
static void s3c_pm_restore_uarts(void) static void s3c_pm_restore_uarts(void)